Det Norske Veritas - Germanischer Lloyd

Electrical Power Cables in Subsea Applications
 N DNV-RP-F401

Annotation

Introduction

This Recommended Practice is to be used as a supplement to ISO 13 628-5 /1/ with regards to electrical power cables. This ISO standard does not give requirements to such cables on a detailed level. This RP covers additional requirements for power cables being submerged in seawater at large water depths and/or being exposed to dynamic excitation, e.g. when suspended from floating production units.

The RP is intended to be used together with /1/. In case of conflict between the ISO standard and this document the ISO standard shall prevail.

It is a pre-requisite that power cables are designed and fabricated according to existing IEC standards.

Application

The RP covers electrical power cables, as single cables or integrated in an umbilical in an application covered by ISO 13 628-5 /1/.

The RP covers cables which comply with IEC 60 502-1 /2/ and IEC 60 502-2 /3/.

The RP applies to cables used for AC power transmission. DC cables are not covered.

Guidance note:

Examples of single cables may e.g. be power supply to direct electrical heating systems for pipelines, main power supply from shore to floating production units, power supply from floating units to subsea installation etc.

Guidance note:

The following definition of an umbilical is given in /1/: "group of functional components, such as electric cables, optical fibre cables, hoses, and tubes, laid up or bundled together or in combination with each other, that generally provides hydraulics, fluid injection, power and/or communication services".